body {
  margin: 0;
  font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
}

div {
  box-sizing: border-box;
}

a,
a:hover,
a:active,
a:visited {
  text-decoration: none;
  color: black;
}

button {
  background: transparent;
  border: none;
  outline: none;
}

ul {
  list-style-type: none;
}

.el-menu {
  border-right: none !important;
}
